package com.atstudying.mall.mallcart.controller;

import com.atstudying.mall.mallcart.service.CartService;
import com.atstudying.mall.mallcart.vo.Cart;
import com.atstudying.mall.mallcart.vo.CartItem;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import java.util.List;
import java.util.concurrent.ExecutionException;

/**
 * @author Mr.zhneg
 * @create 2020-11-15-19:10
 */
@Controller
public class CartController {

    @Autowired
    CartService cartService;


    @GetMapping("/currentUserCartItem")
    //不加这一个会报解析模板异常
    @ResponseBody
    public List<CartItem> getCurrentUserCartItem(){

        return cartService.getUserCartItems();
    }
    @GetMapping("/deleteItem")
    public String deleteItem(@RequestParam("skuId") Long skuId){


        cartService.deleteItem(skuId);
        return "redirect:http://cart.mall.com/cart.html";


    }
    @GetMapping("/countItem")
    public String countItem(@RequestParam("skuId") Long skuId,@RequestParam("num") Integer num){


        cartService.changeItemCount(skuId,num);
        return "redirect:http://cart.mall.com/cart.html";


    }
    @GetMapping("/checkItem")
    public String checkItem(@RequestParam("skuId") Long skuId,@RequestParam("check") Integer check){

        cartService.checkItem(skuId,check);
        return "redirect:http://cart.mall.com/cart.html";

    }
    /**
     * 浏览器有一个cookie：user-key：标识一个用户的身份，一个月后过期
     * 如果第一次使用jd的购物车功能，都会给一个临时的用户身份
     * 浏览器以后保存，每次访问都会带上cookie
     *
     * 登录：session有
     * 没登录：按照cookie里面带来的user-key来做
     * 第一次如果没有临时用户，我们还要帮忙创建一个临时用户
     * @param session
     * @return
     */

    @GetMapping("/cart.html")
    public String cartListPage(Model model) throws ExecutionException, InterruptedException {


        //1：快速得到用户信息id,user-key：我们可以使用ThradLocal
//        UserInfoTo userInfoTo = CartInterceptor.threadLocal.get();
        Cart cart= cartService.getCart();
        model.addAttribute("cart",cart);
        return "cartList";
    }

    /**
     * 添加商品到购物车
     * RedirectAttributes redirectAttributes
     * redirectAttributes.addFlashAttribute()：将数据放在session里面可以在页面取出，但是只可以取一次
     redirectAttributes.addAttribute("skuId",skuId); 将数据放在skuid的url后面

     * @return
     */
    @GetMapping("/addToCart")
    public String addToCart(@RequestParam("skuId")Long skuId, @RequestParam("num") Integer num, Model model, RedirectAttributes redirectAttributes) throws ExecutionException, InterruptedException {

        CartItem cartItem=cartService.addToCart(skuId,num);
        redirectAttributes.addAttribute("skuId",skuId);

        return "redirect:http://cart.mall.com/addToCartSucess.html";
    }

    /**
     * 跳转到成功页
     * @param skuId
     * @param model
     * @return
     */
    @GetMapping("/addToCartSucess.html")
    public String addToCartSucessPage(@RequestParam("skuId") Long skuId,Model model){

        //重定向到成功页面。再次查询购物车数据即可
        CartItem item=cartService.getCartItem(skuId);
        model.addAttribute("item",item);

        return "sucess";
    }
}
